function emailvalidation(entered, alertbox)
{

	with (entered)
	{
	apos=value.indexOf("@");
	dotpos=value.lastIndexOf(".");
	lastpos=value.length-1;
	if (apos<1 || dotpos-apos<2 || lastpos-dotpos>3 || lastpos-dotpos<2) 
	{if (alertbox) {alert(alertbox);} return false;}
	else {return true;}
	}
}

/*
function valuevalidation(entered, min, max, alertbox, datatype)
{

	with (entered)
	{
	checkvalue=parseFloat(value);
	if (datatype)
	  {smalldatatype=datatype.toLowerCase();
	   if (smalldatatype.charAt(0)=="i") {checkvalue=parseInt(value)};
	  }
	if ((parseFloat(min)==min && checkvalue<min) || (parseFloat(max)==max && checkvalue>max) || value!=checkvalue)
	{if (alertbox!="") {alert(alertbox);} return false;}
	else {return true;}
	}
}
*/


function digitvalidation(entered, min, max, alertbox, datatype)
{

	with (entered)
	{
	checkvalue=parseFloat(value);
	if (datatype)
	  {smalldatatype=datatype.toLowerCase();
	   if (smalldatatype.charAt(0)=="i") {checkvalue=parseInt(value); if (value.indexOf(".")!=-1) {checkvalue=checkvalue+1}};
	  }
	if ((parseFloat(min)==min && value.length<min) || (parseFloat(max)==max && value.length>max) || value!=checkvalue)
	{if (alertbox!="") {alert(alertbox);} return false;}
	else {return true;}
	}
}

function emptyvalidation(entered, alertbox)
{

	with (entered)
	{
	if (value==null || value=="")
	{if (alertbox!="") {alert(alertbox);} return false;}
	else {return true;}
	}
}

function formvalidation(thisform)
{
with (thisform)
	{
	if (emptyvalidation(name,"Please provide your Full Name")==false) {name.focus(); return false;};
	if (emailvalidation(email,"Invalid E-mail Address")==false) {email.focus(); return false;};
	
	if (emptyvalidation(txt_address,"Please provide your Address")==false) {txt_address.focus(); return false;};
	if (digitvalidation(phone,3,4,"You MUST enter a valid telephone number.","I","-")==false) {phone.focus(); return false;};
	if (digitvalidation(phone2,3,4,"You MUST enter a valid telephone number.","I","-")==false) {phone2.focus(); return false;};
	if (digitvalidation(phone3,4,5,"You MUST enter a valid telephone number.","I","-")==false) {phone3.focus(); return false;};


	
	if (emptyvalidation(txt_company_name,"Please provide your Company Name")==false) {txt_company_name.focus(); return false;};
	//if (valuevalidation(Value,0,5,"Value MUST be in the range 0-5")==false) {Value.focus(); return false;};
	//if (digitvalidation(txt_phone,10,15,"You MUST enter 10 to 15 digits Phone Number with the Area Code","I")==false) {txt_phone.focus(); return false;};
	//if (emptyvalidation(txt_msg,"Any Messages?")==false) {txt_msg.focus(); return false;};
	}
}