// JavaScript Document
function disable_input(form1,field1,field2,field3)
{
	with(form1)
	{
		field1.disabled=true
		field2.disabled=true
		field3.checked=false
	}
}
function enable_input(form1,field1,field2,field3)
{
	with(form1)
	{
		field1.disabled=false
		field2.disabled=false
		field3.checked=false
	}
}
function checknum(x)
{
	var s_len=x.value.length;
	var s_charcode=0;
	for(i=0;i<s_len;i++)
	{
		s_charcode=x.value.charCodeAt(i);
		if(!((s_charcode>=48 && s_charcode<=57)))
		{
			alert("Only numeric values allowed");
			x.value="";
			x.focus;
			return false;
		}
	}
	return true;
}