function trim(x)
 {
    	var ch,c
    	ch=x.toString()
    	c=ch.charAt(0)
    
		while (c==" ")
    	{
			ch=ch.slice(1)
    		c=ch.charAt(0)
    	}
    	
		c=ch.charAt(ch.length-1)
    
		while(c==" ")
    	{
			ch=ch.slice(0,-1)
    		c=ch.charAt(ch.length-1)
    	}
    	
		return ch;
    }


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 chk_contact_form()
{
	if (trim(document.contact_form.txtFname.value).length==0)
	{	
		alert("Enter your Firstname")
		window.document.contact_form.txtFname.focus();
		return false;
	}
		
	if (trim(document.contact_form.txtLname.value).length==0)
	{	
		alert("Enter your Lastname")
		document.contact_form.txtLname.focus();
		return false;
	}
	

	if (trim(document.contact_form.cboCountry.options[document.contact_form.cboCountry.selectedIndex].value).length==0)
        { 
               	 alert("Select your Country")
                 document.contact_form.cboCountry.focus();
                 return false;
        }	

	
	if (trim(document.contact_form.txtEmail.value).length==0)
	{	
		alert("Enter your Email address")
		document.contact_form.txtEmail.focus();
		return false;
	}
		
	if (isEmail(trim(document.contact_form.txtEmail.value))==false)
        {
            alert("Enter a valid email address ")
            document.contact_form.txtEmail.focus();
            return false;
        }        
        

	if (trim(document.contact_form.cboHow.options[document.contact_form.cboHow.selectedIndex].value).length==0)
        { 
               	 alert("Let us know, how did you hear about us?")
                 document.contact_form.cboHow.focus();
                 return false;
        }	
                

	if (trim(document.contact_form.txtMessage.value).length==0)
	{	
		alert("Enter your Message")
		document.contact_form.txtMessage.focus();
		return false;
	}


	return true;	
        
	}