var scrTimer = 20;
var scrTmId=0;	

var jump_inc = 100;
var movr_inc = 4;

function stopScroll() {
	clearTimeout(scrTmId);
	scrTmId = 0;
}
function loadScrLyr(num,lyr,id) {
	if (!pgLoaded) return;
	if (typeof wndo[num].cnt != "undefined") wndo[num].cnt.hide();
	wndo[num].cnt = new dw_scrollObj(lyr,id);
	wndo[num].cnt.show();
	wndo[num].cnt.shiftTo(0,0);	
	wndo[num].maxX = wndo[num].cnt.width - wndo[num].width;
	wndo[num].maxY = wndo[num].cnt.height - wndo[num].height
} 


function moveDown(num,inc) {
	if (!pgLoaded||!wndo[num]) return;
	if (scrTmId) clearTimeout(scrTmId);
	var y = parseInt(wndo[num].cnt.css.top);
	if (y>-wndo[num].maxY) { 
		wndo[num].cnt.shiftAbsolute(0,-inc);
	}
}



function inchDown(num,inc) {
	if (!pgLoaded||!wndo[num]) return;
	if (scrTmId) clearTimeout(scrTmId);
	var y = parseInt(wndo[num].cnt.css.top);
	if (y>-wndo[num].maxY) { 
		wndo[num].cnt.shiftBy(0,-inc);
		scrTmId = setTimeout("inchDown("+num+","+inc+")",scrTimer);	
	}
}

function inchUp(num,inc) {
	if (!pgLoaded||!wndo[num]) return;
	if (scrTmId) clearTimeout(scrTmId);
	var y = parseInt(wndo[num].cnt.css.top);
	if (y<0) { 
		wndo[num].cnt.shiftBy(0,inc);
		scrTmId = setTimeout("inchUp("+num+","+inc+")",scrTimer);	
  }
}

function inchRight(num,inc) {
	if (!pgLoaded||!wndo[num]) return;
	if (scrTmId) clearTimeout(scrTmId);
	var y = parseInt(wndo[num].cnt.css.left);	
	if (y>-wndo[num].maxX) { 
		wndo[num].cnt.shiftBy(-inc,0);
		scrTmId = setTimeout("inchRight("+num+","+inc+")",scrTimer);	
	}
}

function inchLeft(num,inc) {
	if (!pgLoaded||!wndo[num]) return;
	if (scrTmId) clearTimeout(scrTmId);
	var y = parseInt(wndo[num].cnt.css.left);
	if (y<0) { 
		wndo[num].cnt.shiftBy(inc,0);
		scrTmId = setTimeout("inchLeft("+num+","+inc+")",scrTimer);	
  }
}



function jumpDown(num,jump) {
	if (!pgLoaded||!wndo[num]) return;
	var y = parseInt(wndo[num].cnt.css.top);
	if (y>(-wndo[num].maxY)) { 
		if ((y-jump)>(-wndo[num].maxY)) wndo[num].cnt.shiftBy(0,-jump);
		else wndo[num].cnt.shiftBy(0,-(wndo[num].maxY-Math.abs(y)));	
  }
}

function jumpUp(num,jump) {
	if (!pgLoaded||!wndo[num]) return;
	var y = parseInt(wndo[num].cnt.css.top);
	if (y<0) { 
		if ((y+jump)<=0) wndo[num].cnt.shiftBy(0,jump); 
		else wndo[num].cnt.shiftBy(0,-y); 
	}
}

function jumpRight(num,jump) {
	if (!pgLoaded||!wndo[num]) return;
	var x = parseInt(wndo[num].cnt.css.left);
	if (x>(-wndo[num].maxX)) {
		if ((x-jump)>(-wndo[num].maxX)) wndo[num].cnt.shiftBy(-jump,0);
		else wndo[num].cnt.shiftBy(-(wndo[num].maxX-Math.abs(x)),0);	
  }
}

function jumpLeft(num,jump) {
	if (!pgLoaded||!wndo[num]) return;
	var x = parseInt(wndo[num].cnt.css.left);
	if (x<0) { 
		if ((x+jump)<=0) wndo[num].cnt.shiftBy(jump,0); 
		else wndo[num].cnt.shiftBy(-x,0); 
	}
}