JS中提示数组为空或不是对象，求大神，在线等！

var locationArray =new Array;function mineCoordinate(mineNum,rowCoord,colCoord)//创建不同大小的数组{ locationArray.length=0;//重置数组 for(var num=0; num<mineNum;num++) { var x=Math.round(Math.random()*rowCoord); var y=Math.round(Math.random()*colCoord); locationArray.push([x,y]); } alert("创建成功"+locationArray.length);}function mineLocation(){ switch (tableNode.rows[0].cells.length) { case 6: mineCoordinate(5,5,5); break; case 12: mineCoordinate(20,11,11); break; case 21: mineCoordinate(18,14,20); break; case 33: mineCoordinate(28,15,32); break; default: alert("未知错误"); break; }}function mineVisible(mineNum){ var row=event.srcElement.parentNode.rowIndex; var col=event.srcElement.cellIndex; for(var temp=0;temp<mineNum;temp++) { if(locationArray[temp][0]==row && locationArray[temp][1]==col)//问题出在这里：会提示数组为空或不是对象，哪里错了呢????? { clearInterval(timeInterval); for(var temp1=0;temp1<mineNum;temp1++) { var xRow=locationArray[temp1][0]; var xCol=locationArray[temp1][1]; tableNode.rows[xRow].cells[xCol].innerHTML="<imgsrc=✀img/123.jpg✀ height=✀19✀ width=✀16✀/>"; } return; } }}