function intDigits(e)
{	
	if(window.event)
    {
		
		if((event.keyCode>=48 && event.keyCode<=57) || event.keyCode == 8 || event.keyCode == 13 || event.keyCode == 0 ) {
			return true;	
		}
		else
		{	
			event.keyCode=0;
			return false;
		}
	}
	 else
        {
				key = e.which;     //firefox
				if((key >=48 && key <= 57) || key == 8 || key == 13 || key == 0) {
				return true;	
				}
				else
				{	
					key=0;
					return false;
		
				}

        }
}
function intChars(e)
{	
	if(window.event)
    {
		
		if((event.keyCode>=65 && event.keyCode<=90) || (event.keyCode>=97 && event.keyCode<=122) || event.keyCode == 8 || event.keyCode == 13 || event.keyCode == 0 ) {
			return true;	
		}
		else
		{	
			event.keyCode=0;
			return false;
		}
	}
	 else
        {
				key = e.which;     //firefox
				if((key >=65 && key <= 90) || (key >=97 && key <= 122) || key == 8 || key == 13 || key == 0) {
				return true;	
				}
				else
				{	
					key=0;
					return false;
		
				}

        }
}

function isEmail(str) 
{
  // are regular expressions supported?
  var supported = 0;
  if (window.RegExp) {
	var tempStr = "a";
	var tempReg = new RegExp(tempStr);
	if (tempReg.test(tempStr)) supported = 1;
  }
  if (!supported) 
	return (str.indexOf(".") > 2) && (str.indexOf("@") > 0);
	  var r1 = new RegExp("(@.*@)|(\\.\\.)|(@\\.)|(^\\.)");
	  var r2 = new RegExp("^.+\\@(\\[?)[a-zA-Z0-9\\-\\.]+\\.([a-zA-Z]{2,3}|[0-9]{1,3})(\\]?)$");
	  return (!r1.test(str) && r2.test(str));
}

function trim(tmp)
{
	var temp;
	temp = tmp;
	//tmp = "      this is test     ";
	pat = /^\s+/;
	temp = temp.replace(pat, "");
	pat = /\s+$/;
	temp = temp.replace(pat, "");
	//alert(":" + tmp + ":");
	return temp;
}
function validate(frm)
{		
		if(trim(frm.fname.value).length==0)
		{
			frm.fname.focus();
			alert("Please enter first name.");
			return false;
		}
		if(trim(frm.lname.value).length==0)
		{
			frm.lname.focus();
			alert("Please enter last name.");
			return false;
		}
		if(trim(frm.phone.value).length==0)
		{
			frm.phone.focus();
			alert("Please enter phone.");
			return false;
		}
		
		if(trim(frm.email.value).length==0)
		{
			frm.email.focus();
			alert("Please enter email.");
			return false;
		}
		
		if(!isEmail(trim(frm.email.value)))
		{
			alert("Please enter valid email.");
			frm.email.focus();
			return false;
		}
		if(trim(frm.comments.value).length==0)
		{
			frm.comments.focus();
			alert("Please enter comments.");
			return false;
		}
		
		return true;
}