function trimString(sInString) {

  sInString = sInString.replace( /^\s+/g, "" );// strip leading

  return sInString.replace( /\s+$/g, "" );// strip trailing

}





function isEmpty(inputStr){

   if (inputStr == null || trimString(inputStr) == ""){

      return true;

   }



   return false;

}





function isNumeric(inputVal){



   oneDecimal = false;

   inputStr = inputVal.toString();

   for (var i = 0; i < inputStr.length; i ++){

      var oneChar = inputStr.charAt(i);

      if (i == 0 && oneChar == "-"){

         continue;

      }



      if (oneChar == "."){

         if (oneDecimal){

            return false;

         } else {

            oneDecimal = true;

         }

         continue;

      }



      if (oneChar < "0" || oneChar > "9"){

         return false;

      }

   }



   return true;

}





function validateZip(form) {

	if (form.zip.value =='Your ZIP')

            form.zip.value='';



	if (isEmpty(form.zip.value)) {

		alert("Please input a 5-digit zip code for tax and shipping cost");

		form.zip.focus();

		return false;

	}



	if (!isEmpty(form.zip.value) && !isNumeric(trimString(form.zip.value))) {	

                alert("Please input a 5-digit zip code for tax and shipping cost");

		form.zip.focus();

		return false;

	}

        

	form.zip.value=trimString(form.zip.value);

        form.submit();  



}







function validatePrices(form) {

	

	if (isEmpty(form.query.value)) {

		alert("Please input a keyword for product search");

		form.query.focus();

		return false;

	}



	if (!isEmpty(form.lowestprice.value) && !isNumeric(trimString(form.lowestprice.value))) {	

		alert("Please input a numeric value for lowest price");

		form.lowestprice.focus();

		return false;

	}

	if (!isEmpty(form.highestprice.value) && !isNumeric(trimString(form.highestprice.value))) {	

		alert("Please input a numeric value for highest price");

		form.highestprice.focus();

		return false;

	}	

	form.lowestprice.value=trimString(form.lowestprice.value);

	form.highestprice.value=trimString(form.highestprice.value);

	form.query.value=trimString(form.query.value);

    form.submit();  



}





function validateMinMaxPrices(form) {

	

	if (isEmpty(form.minPrice.value) || (!isEmpty(form.minPrice.value) && !isNumeric(trimString(form.minPrice.value)))) {	

		alert("Please input a numeric value for minimal price");

		form.minPrice.focus();

		return false;

	}

	if (isEmpty(form.maxPrice.value) || (!isEmpty(form.maxPrice.value) && !isNumeric(trimString(form.maxPrice.value)))) {	

		alert("Please input a numeric value for max price");

		form.maxPrice.focus();

		return false;

	}	

	form.minPrice.value=trimString(form.minPrice.value);

	form.maxPrice.value=trimString(form.maxPrice.value);



    form.submit();  



}





function validate(obj) {

    if(obj.value=="") {

        return false;

    }

    return true;

}





function validateNewsKey(form) {

	

	if (isEmpty(form.query.value)) {

		alert("Please input a keyword for news search");

		form.query.focus();

		return false;

	}



	form.query.value=trimString(form.query.value);

        form.submit();  



}



function checkEnter(e, form){ 

	var characterCode 

 

	if(e && e.which){ 

		e = e

		characterCode = e.which 

	}

	else{

		e = event

		characterCode = e.keyCode 

	}



	if(characterCode == 13){ 

	    validatePrices(form);

		//document.forms[0].submit() 

		return false

	}

	else{

		return true

	}



}



function Checkcount( which ) {

  var i=0;

  var count=0;

  for(i=0; i<document.compare.elements.length; i++)

  {

    if (document.compare.elements[i].checked == true){count++;}

    if (count > 8) {

       alert('A maximum of 8 products can be compared at one time');

       document.compare[which].checked = false;

       break;

    }

  }

  if (which == 'Form') {

     if (count <= 1) {

         alert('Choose at least two products to compare with');

         return false;

     } else {

         return true;

     }

  }

}



function Toggle(menu) {

menu.parentNode.className=(menu.parentNode.className == 'closed')?'open':'closed';

}

function ExpandAll() {

 var i=0;

 if (document.getElementById("ExpLabel").innerHTML == 'Expand all') {

    while(document.getElementById("Node" + i)){

    document.getElementById("Node" + i).className='open';

    i = i + 1;

     }

    document.getElementById("ExpLabel").innerHTML='Collapse all';

    }

    else

    {

    while(document.getElementById("Node" + i)){

    document.getElementById("Node" + i).className='closed';

    i = i + 1;

     }

    document.getElementById("ExpLabel").innerHTML='Expand all';

 }

}


function go(obj) {

        if(isEmpty(obj.value)) {

                alert('Please input keyword(s) to search. ---');

                obj.focus();

                return false;

        }

       // alert ('this form action =' + obj.form.action);
		//alert ('button clicked =' + obj.form.news.value);
      return true;

}





function changeText() {

 var myDiv1 = document.getElementById('myDiv1');

 var myDiv2 = document.getElementById('myDiv2');

 var myDiv3 = document.getElementById('myDiv3');

 var myDiv4 = document.getElementById('myDiv4');



 if (myDiv1 != null)

   myDiv1.innerHTML = '';



 if (myDiv2 != null)

 myDiv2.innerHTML = '';



 if (myDiv3 != null)

 myDiv3.innerHTML = '';



 if (myDiv4 != null)

 myDiv4.innerHTML = '';





}



//changeText();