Modify the js Calendar calendar control to be compatible with IE9/Google/Firefox_javascript skills

this.iframe = window.frames("meizzCalendarIframe");

this.iframe = window.frames["meizzCalendarIframe"];

var a = (arguments.length= =0) ? WebCalendar.day[this.id.substr(8)].split("/") : arguments[0].split("/");

var a = WebCalendar.day[this.id.substr(8 )].split("/");

function dayMouseOver()
{
this.className = "over";
this.style.backgroundColor = WebCalendar.darkColor;
if(WebCalendar .day[this.id.substr(8)].split("/")[1] == WebCalendar.thisMonth)
this.style.color = WebCalendar.lightColor;
}
function dayMouseOut ()
{
this.className = "out"; var d = WebCalendar.day[this.id.substr(8)], a = d.split("/");
this. style.removeattribute("backgroundColor");
if(a[1] == WebCalendar.thisMonth && d != WebCalendar.today)
{
if(WebCalendar.dateStyle && a[0] == parseInt(WebCalendar.dateStyle[4], 10))
this.style.color = WebCalendar.lightColor;
this.style.color = WebCalendar.wordColor;
}
}

var bgbgbg;
function dayMouseOver()
{
this.className = "over";
bgbgbg=this.style.backgroundColor;
this.style.backgroundColor = WebCalendar.darkColor;
if(WebCalendar .day[this.id.substr(8)].split("/")[1] == WebCalendar.thisMonth)
this.style.color = WebCalendar.lightColor;
}
function dayMouseOut ()
{
this.className = "out"; var d = WebCalendar.day[this.id.substr(8)], a = d.split("/");
this. style.backgroundColor = bgbgbg;
if(a[1] == WebCalendar.thisMonth && d != WebCalendar.today)
{
if(WebCalendar.dateStyle && a[0] == parseInt(WebCalendar .dateStyle[4], 10))
this.style.color = WebCalendar.lightColor;
this.style.color = WebCalendar.wordColor;
}
}