var ns6=document.getElementById&&!document.all

function restrictinput(maxlength,e,placeholder){
	if (window.event&&event.srcElement.value.length>=maxlength)
		return false
	else if (e.target&&e.target==eval(placeholder)&&e.target.value.length>=maxlength){
			var pressedkey=/[a-zA-Z0-9\.\,\/]/ //detect alphanumeric keys
				if (pressedkey.test(String.fromCharCode(e.which)))
					e.stopPropagation()
			}
}

function countlimit(maxlength,e,placeholder){
	var theform=eval(placeholder)
	var lengthleft=maxlength-theform.value.length
	var placeholderobj=document.all? document.all[placeholder] : document.getElementById(placeholder)

	if (window.event||e.target&&e.target==eval(placeholder)){
		if (lengthleft<0)
			theform.value=theform.value.substring(0,maxlength)
			placeholderobj.innerHTML=lengthleft
		}
}


function displaylimit(theform,thelimit){
	var limit_text='จำนวนตัวอักษร ที่เหลือ <b><span id="'+theform.toString()+'">'+thelimit+'</span></b> ตัวอักษร'
	if (document.all||ns6)
		document.write(limit_text)
	if (document.all){
		eval(theform).onkeypress=function(){ return restrictinput(thelimit,event,theform)}
		eval(theform).onkeyup=function(){ countlimit(thelimit,event,theform)}
	}
	else if (ns6){
			document.body.addEventListener('keypress', function(event) { restrictinput(thelimit,event,theform) }, true); 
			document.body.addEventListener('keyup', function(event) { countlimit(thelimit,event,theform) }, true); 
	}
}
//  End Count letter

var checkobj

function agreesubmit(el){
	checkobj=el
	if (document.all||document.getElementById){
	for (i=0;i<checkobj.form.length;i++){  //hunt down submit button
		var tempobj=checkobj.form.elements[i]
		if(tempobj.type.toLowerCase()=="submit")
			tempobj.disabled=!checkobj.checked
	}
	}
}

function defaultagree(el){
	if (!document.all&&!document.getElementById){
		if (window.checkobj&&checkobj.checked)
			return true
		else{
			alert("โปรดกรอก ข้อความแนะนำตัวเอง และยืนยันความถูกต้องของข้อมูลก่อน บันทึก")
		return false
		}
	}
}