JavaScript scripting _javascript tips for solving test score statistics problems

Copy Code code as follows:

/**
* @author georgewing
*/
function Preparecheckbox () {
document.getElementById ("Submit"). onclick = function () {
Selectedcheckbox (4);
}
}
function Selectedcheckbox (x) {
var oinput = document.getelementsbytagname ("input");
var itotal = 0;
for (Var i=0;i<oinput.length;i++) {
if (Oinput[i].classname = = "Checkedradio") {
if (oinput[i].checked) {
Add x Point
Itotal = itotal + x;
}
else {
Add 0 Point
Itotal = itotal + 0;
}
}

}
document.getElementById ("Total"). setattribute ("value", itotal);
alert (itotal);
}

Tip: The constant 4 is abstracted as a variable x as a function parameter. This is hard coding abstraction, the specific content of hard coding, abstraction see "DOM scripting" the part of the translation book.