如何使用js实现图片漂浮效果web开发

varxPos=0;

varyPos=0;

vardirectionX=true;

vardirectionY=true;

varstep=1;

varspeed=1;

varfloat=document.getElementById("float");

functionmove(){

varheight=document.documentElement.clientHeight;

varwidth=document.documentElement.clientWidth;

varimgHeight=float.offsetHeight;

varimgWidth=float.offsetWidth;

float.style.left=xPos+document.documentElement.scrollLeft+"px";

float.style.top=yPos+document.documentElement.scrollTop+"px";

if(directionX){xPos=xPos+step;}else{xPos=xPos-step;}

if(xPos<=0){xPos=0;directionX=true;}

if(xPos>=width-imgWidth){xPos=width-imgWidth;directionX=false;}

if(directionY){yPos=yPos+step;}else{yPos=yPos-step;}

if(yPos<=0){yPos=0;directionY=true;}

if(yPos>=height-imgHeight){yPos=height-imgHeight;directionY=false;}

t=setTimeout(move,speed);

}

float.onmouseover=function(){clearTimeout(t);}

float.onmouseout=function(){t=setTimeout("move()",speed);}