var xPos=300;var yPos=200;var step=1;var delay=30;var height=0;var Hoffset=0;var Woffset=0;var yon=0;var xon=0;var pause=true;var interval;var img1=document.getElementById("apDiv2");img1.style.top=yPos;function changePos(){width=document.documentElement.clientWidth;height=document.documentElement.clientHeight;Hoffset=img1.offsetHeight;Woffset=img1.offsetWidth;var sc_top = document.documentElement.scrollTop ? document.documentElement.scrollTop : document.body.scrollTop;var sc_left = document.documentElement.scrollLeft ? document.documentElement.scrollLeft : document.body.scrollLeft;img1.style.left=xPos+sc_left+'px';img1.style.top=yPos+sc_top+'px';if(yon){yPos=yPos+step}else{yPos=yPos-step}if(yPos<0){yon=1;yPos=0}if(yPos>=(height-Hoffset)){yon=0;yPos=(height-Hoffset)}if(xon){xPos=xPos+step}else{xPos=xPos-step}if(xPos<0){xon=1;xPos=0}if(xPos>=(width-Woffset)){xon=0;xPos=(width-Woffset)}}function start(){img1.visibility="visible";interval=setInterval("changePos()",delay)}start();function check_this(B){var A=B||window.event;if(window.event){A.returnValue=false}else{A.preventDefault()}}window.onscroll=function(){var sc_top = document.documentElement.scrollTop ? document.documentElement.scrollTop : document.body.scrollTop;var sc_left = document.documentElement.scrollLeft ? document.documentElement.scrollLeft : document.body.scrollLeft;var sc_Height = document.documentElement.scrollHeight ? document.documentElement.scrollHeight : document.body.scrollHeight;if(sc_top<=100) document.getElementById("float_list_button").style.top=80+'px';if (sc_top+800>=document.documentElement.scrollHeight) document.getElementById("float_list_button").style.top=sc_top-500+'px';if(sc_top+800<sc_Height&&sc_top>300) document.getElementById("float_list_button").style.top=sc_top-240+'px';}