Trim the Contents of HTML Form Elements

 
<input type=text name=txtName title="C-Name">

 
<input type=submit onClick="return CheckNull">

<script language=javascript>

function CheckNull()
{
	i=0
	for (i=0;i<document.frm.length;i++)
		{
		strValue= new String();
		strValue=document.frm.elements[i].title;

		if(strValue.length==0) {}
		else
				{
			Trim(document.frm.elements[i]);

			if(strValue.substr(0,1)=="C" &&
document.frm.elements[i].value.length==0)
				{
				alert("Enter The value  " _
+ strValue.substr(2,strValue.length))
				document.frm.elements[i].focus()
				return false;
				break;
			 }
			}
			}
}

function Trim(text)
	{
	while(text.value.charAt(0)==' ')
	text.value=text.value.substring(1,text.value.length )
	while(text.value.charAt(text.value.length-1)==' ')
	text.value=text.value.substring(0,text.value.length-1)

	}
</script>