HTML Button related Javascript Functions

1.How to create an IMAGE button through Javascript
Function Arguments

1. srcImg:-the Default Image url
   
2. mouseOverImg :- the mouse over Image url

function createIMGButton(srcImg,mouseOverImg){
var but=document.createElement("IMG");
but.src=srcImg;
but.onmouseover=new function(){but.src=mouseOverImg;}
return but;
}

2.HTML Button Mouse Listener.
Function Arguments

1. but:-The HTML button Object
   
2. mouseOverImg :- the mouse over Image url
3. mouseOutImg:- the mouse out Image url

function buttonMouseListener(but,mouseOverImg,mouseOutImg){
but.onmouseover = function(){but.src=mouseOverImg;}
but.onmouseout = function(){but.src=mouseOutImg;}
}

3.Create HTML CheckBox
Function Arguments

1. The id of the checkBox.
   

function createChkBox(id){
var checkBox = document.createElement("input");
checkBox.type = "checkbox"; // set type
checkBox.id = id;
return checkBox;
}