var checkobj

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

function disabilita(el){
	if (!document.all&&!document.getElementById){
			if (window.checkobj&&checkobj.checked)
return true
		else{
alert("Per favore accetta i termini del contratto")
return false
						}
					}
				}