function moveElement(elementID,final_x,final_y,interval){
if(!document.getElementById) return false;
if(!document.getElementById(elementID)) return false;
var elem = document.getElementById(elementID);
var xpos = parseInt(elem.style.left);
var ypos = parseInt(elem.style.top);
if(xpos == final_x && ypos == final_y){
return true;
}
if(xpos < final_x){
xpos++;
}
if(xpos > final_x){
xpos--;
}
if(ypos < final_y){
ypos++;
}
if(ypos > final_y){
ypos--;
}
elem.style.left = xpos + 'px';
elem.style.top = ypos + 'px';
var repeat = "moveElement('"+elementID+"',"+final_x+","+final_y+","+interval+")";
movement = setTimeout(repeat,interval);
}
为什么var repeat = "moveElement('"+elementID+"',"+final_x+","+final_y+","+interval+")";这里要写+....+,能不能直接写final_x?
if(!document.getElementById) return false;
if(!document.getElementById(elementID)) return false;
var elem = document.getElementById(elementID);
var xpos = parseInt(elem.style.left);
var ypos = parseInt(elem.style.top);
if(xpos == final_x && ypos == final_y){
return true;
}
if(xpos < final_x){
xpos++;
}
if(xpos > final_x){
xpos--;
}
if(ypos < final_y){
ypos++;
}
if(ypos > final_y){
ypos--;
}
elem.style.left = xpos + 'px';
elem.style.top = ypos + 'px';
var repeat = "moveElement('"+elementID+"',"+final_x+","+final_y+","+interval+")";
movement = setTimeout(repeat,interval);
}
为什么var repeat = "moveElement('"+elementID+"',"+final_x+","+final_y+","+interval+")";这里要写+....+,能不能直接写final_x?
所以加上++就是final_x变量了