function LTrim(value) 
{
	var re = /\s*((\S+\s*)*)/;
	return value.replace(re, "$1");
}

function RTrim(value) 
{
	var re = /((\s*\S+)*)\s*/;
	return value.replace(re, "$1"); 	
}

function trim( value ) 
{	
	return LTrim(RTrim(value));	
}

function convert(id)
{
	var input = document.getElementById("input"+id).value;
	var result = document.getElementById("result"+id).value;
	input = trim(input);
	result = trim(result);
	var total;
	var pat = /^[0-9]*$/;
	if(input != "" &&  pat.test(input))
	{
		total = (parseInt(input) * result);			
		document.getElementById("display"+id).innerHTML = '';
		document.getElementById("display"+id).innerHTML = total;
	}
	else
	{
		alert("Please Enter value");
		document.getElementById("input"+id).value = "1"
		document.getElementById("input"+id).focus();
	}

}