var x = 150, y = 160
var xin = true, yin = true
var step = 1
var delay = 10
var itl 
var obj = document.getElementById("pcb_ad_img")
function floatpcb_ad_img() {
    var L = T = 0
    var R = document.body.clientWidth - obj.offsetWidth
    //var B = document.body.clientHeight - 160 - obj.offsetHeight
    var B = 400 - obj.offsetHeight

    obj.style.left = x + document.body.scrollLeft
    obj.style.top = y + 160 + document.body.scrollTop
	
    x = x + step * (xin ? 1 : -1)
	
    if (x < L) { xin = true; x = L }
	
    if (x > R) { xin = false; x = R }
	
    y = y + step * (yin ? 1 : -1)
	
    if (y < T) { yin = true; y = T }
	
    if (y > B) { yin = false; y = B }
}
function Help_Close_Click() {
    obj.style.display='none'  
}

itl = setInterval("floatpcb_ad_img()", 10)

obj.onmouseover = function () { clearInterval(itl) }
obj.onmouseout  = function () { itl = setInterval("floatpcb_ad_img()",10) }