调用方式方法,

<script>
function delArray(StrArr,Str,zt){
	var index=0
	for(var i=0;i<StrArr.length;i++){
		if(StrArr[i]===Str){
			index = i;
			break;
		};
	};
	if (zt=="l"){
		StrArr.splice(0,index)	;
	}else if (zt=="r"){
		StrArr.splice(index+1,StrArr.length);
	}else{
		StrArr.splice(0,index);
		StrArr.splice(1,StrArr.length);
	}
	return StrArr;
};
var arr2 =["111","222","333","444","555","666","777","888"];
arr2=delArray(arr2,"555","");
console.log(arr2);
</script>