var errmsg = "";

	function validate_form(thisform)
		
	{ with (thisform)
		
	{
		errmsg = "";
		var ret_status = true;
		if (firstname.value == "" || firstname.value == null) {
			errmsg = errmsg + ("First Name is required information.\n");
			ret_status = false;
		}
		
		if (lastname.value == "" || lastname.value == null) {
			errmsg = errmsg + ("Last Name is required information.\n");
			ret_status = false;
		}

	/*	
		if (companyname.value == "" || companyname.value == null) {
			errmsg = errmsg + ("Company Name is required information.\n");
			ret_status = false;
		}

	if (address1.value == "" || address1.value == null) {
			errmsg = errmsg + ("Street Address is required information.\n");
			ret_status = false;
		}

		if (city.value == "" || city.value == null) {
			errmsg = errmsg + ("City is required information.\n");
			ret_status = false;
		}
		
		if (state.value == "" || state.value == null) {
			errmsg = errmsg + ("State is required information.\n");
			ret_status = false;
		}
		

		if (zip.value == "" || zip.value == null) {
			errmsg = errmsg + ("Zip/Postal Code is required information.\n");
			ret_status = false;
		}
*/
		if (phone.value == "" || phone.value == null) {
			errmsg = errmsg + ("Telephone number is required information.\n");
			ret_status = false;
		}

		
		email_status = validate_email(emailaddress, "Please enter a valid email address"); 
		ret_status = ret_status && email_status
		if (!email_status)  {
			errmsg = errmsg + "Please enter a valid email address\n";
		}

		if (errmsg != "") {
			alert(errmsg);
		}
		
		if (ret_status) {
			setCookie("chemistries_request", Date(), 1825);
		
		
		}
		return ret_status;
	}
	}		

function validate_email(field,alerttxt)
{
with (field)
{

apos=value.indexOf("@")
dotpos=value.lastIndexOf(".")
if (apos<1||dotpos-apos<2) 
  {return false}
else {return true}
}
}


function setCookie(c_name,value,expiredays)
{
var exdate=new Date()
exdate.setDate(exdate.getDate()+expiredays)
document.cookie=c_name+ "=" +escape(value)+
((expiredays==null) ? "" : ";expires="+exdate.toGMTString())
}



function getCookie(c_name)
{
if (document.cookie.length>0)
  {
  c_start=document.cookie.indexOf(c_name + "=")
  if (c_start!=-1)
    { 
    c_start=c_start + c_name.length+1 
    c_end=document.cookie.indexOf(";",c_start)
    if (c_end==-1) c_end=document.cookie.length
    return unescape(document.cookie.substring(c_start,c_end))
    } 
  }
return ""
}

function chemistriesURL(url)
{
	previous_vists = getCookie("chemistries_request");
	if (previous_vists == "" || previous_vists == null) {
		document.write('<a href="chemistries_form.html?msds=' + url + '">MSDS</a>');
	} else {
		document.write('<a href="' + '/industrial/pdf/' + url + '">MSDS</a>');
	}

}

function gup( name )
{
  name = name.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
  var regexS = "[\\?&]"+name+"=([^&#]*)";
  var regex = new RegExp( regexS );
  var results = regex.exec( window.location.href );
  if( results == null )
    return "";
  else
    return results[1];
}