function addEvent(obj,evtType,func,cap){   
    cap=cap||false;   
    if(obj.addEventListener){   
        obj.addEventListener(evtType,func,cap);   
        return true;   
    }else if(obj.attachEvent){   
        if(cap){   
            obj.setCapture();   
            return true;   
        }else{   
            return obj.attachEvent("on" + evtType,func);   
        }   
    }else{   
        return false;   
    }   
}   
function getPageScroll(){   
    var xScroll,yScroll;   
    if (self.pageXOffset) {   
        xScroll = self.pageXOffset;   
    } else if (document.documentElement && document.documentElement.scrollLeft){   
        xScroll = document.documentElement.scrollLeft;   
    } else if (document.body) {   
        xScroll = document.body.scrollLeft;   
    }   
    if (self.pageYOffset) {   
        yScroll = self.pageYOffset;   
    } else if (document.documentElement && document.documentElement.scrollTop){   
        yScroll = document.documentElement.scrollTop;   
    } else if (document.body) {   
        yScroll = document.body.scrollTop;   
    }   
    arrayPageScroll = new Array(xScroll,yScroll);   
    return arrayPageScroll;   
}   
function GetPageSize(){   
    var xScroll, yScroll;   
    if (window.innerHeight && window.scrollMaxY) {       
        xScroll = document.body.scrollWidth;   
        yScroll = window.innerHeight + window.scrollMaxY;   
    } else if (document.body.scrollHeight > document.body.offsetHeight){   
        xScroll = document.body.scrollWidth;   
        yScroll = document.body.scrollHeight;   
    } else {   
        xScroll = document.body.offsetWidth;   
        yScroll = document.body.offsetHeight;   
    }   
    var windowWidth, windowHeight;   
    if (self.innerHeight) {   
        windowWidth = self.innerWidth;   
        windowHeight = self.innerHeight;   
    } else if (document.documentElement && document.documentElement.clientHeight) {   
        windowWidth = document.documentElement.clientWidth;   
        windowHeight = document.documentElement.clientHeight;   
    } else if (document.body) {   
        windowWidth = document.body.clientWidth;   
        windowHeight = document.body.clientHeight;   
    }       
    if(yScroll < windowHeight){   
        pageHeight = windowHeight;   
    } else {    
        pageHeight = yScroll;   
    }   
    if(xScroll < windowWidth){       
        pageWidth = windowWidth;   
    } else {   
        pageWidth = xScroll;   
    }   
    arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight)    
    return arrayPageSize;   
}